PIE 850 10-50 mA Multifunction Process Calibrator

• Quickly diagnose troublesome ground faults & current leakage with patented Loop Diagnostic technology. These problems are undetectable with other instruments
• Simultaneously displays current, voltage and resistance to let you know the condition of a live loop. Finds problems with power supplies & loops with too many loads. Patented by PIE

The PIE Model 850 is more than a multifunction calibrator. It is also a loop detective that is able to diagnose common problems that other test equipment just can’t find. Have a flooded junction box or unknown ground faults? Our Loop Diagnostic technology will detect.

Become a troubleshooting technician with Patented Diagnostic Technology - Available only with PIE Calibrators!

Carry eight single function calibrators
plus a 4-20/10-50 milliamp calibrator with loop supply
plus a loop troubleshooter in the palm of your hand!

• Milliamp
• Voltage
• Frequency
• pH
• Ohms
• Thermocouples
• RTDs
• Pressure
• Loop Diagnostics
• Transmitter Supply

Easy to use Multifunction Calibrator

• Technician friendly operation
  Intuitive EZ-DIAL Double Click Menu makes it easier to setup than other multifunction calibrators. As easy to use as single function PIE Calibrators. Turn on the backlight to easily see the display in dark areas of the plant. Connections diagrams are indicated on the display for each function along with a labeled connector and a help chart behind the tilt stand.
• Calibrate with Confidence
  Accurate to ±0.02% of Reading + 0.01% Full Scale. Measure temperature sensors, frequency pickups, loop currents, voltage levels & pressuresCheck the values of your process sensors. Instantly recall MAX and MIN values to see process variability.
• Guaranteed Compatibility with process inputs
  Compatible with the instruments you use including all brands of smart transmitters and PLCs with 14 T/C and 9 RTD types to 0.1°C and 0.1°F
• Quickly set any three outputs plus automatic stepping & ramping
  Easily set any value with the adjustable “DIAL” plus store any three output settings for instant recall with the EZ-CHECK™ switch. 2, 3, 5 & 11 steps automatically increment output in 100%, 50%, 25% or 10% of span plus continuous ramp. Set step/ramp time to 5, 6, 7, 8, 10, 15, 20, 25, 30 & 60 seconds.

Milliamp Calibrator

• Easy to use
  With the 850 you can check, calibrate and measure all of your current signal instruments in 4 to 20 & 10 to 50 milliamp DC loops. It can be used at any access point in your loop. Source & Read 0.000 to 24.000 or 52.000 mA, Simulate a 2 Wire Transmitter or use the 850 to simultaneously power your 2 Wire Transmitter and measure its output.
   
• Source milliamps
  Calibrate recorders, digital indicators, stroke valves or any instruments that get their input from a 4 to 20 or 10 to 50 mA loop. Easily set any value quickly to within 0.001 mA with the adjustable digital potentiometer “EZ-DIAL” or use preset 4.000 or 10.000 mA (0.00%) and 20.000 or 50.000 mA (100.00%) EZ-CHECK™ settings.
   
• Calibrate using loop power
  Check loop wiring and receivers by using the 850 in place of a 2 Wire transmitter. Uses any loop power from 2 to 60 V DC.
   
• Read loop current
  Check controller outputs or measure the milliamp signal anywhere in the loop. The 850 measures 0.000 to 52.000 mA (-25.00 to 125.00%) signals with greater accuracy than a typical multimeter.
   
• Power & measure 2 wire transmitters
  The 850 can simultaneously output 24V DC @ 20 mA or 40V DC @ 50 mA to power any and all devices in a process loop using the internal batteries and internal switching power supply, while measuring the output of a 2 Wire Transmitter and any other loop devices. Powers HART™ transmitters (4-20 mA only) with built-in 250 ohm resistor simplifying hookups with HART communicators.
  
  The 850 has an internal 40 V power supply which is able to drive transmitters and positioners in 10-50 mA loops. Some other brands of calibrators have a 24 V supply which are unable to supply the power required to properly drive these control devices.

Voltage Calibrator

•  Source three ranges of mV & V dc
  With the 850 you can check, calibrate and measure all your voltage, millivolt and pH signal instruments in your plant. Source 0.000 to 10.250 V dc, -500.00 to 999.99 mV and -20.000 to 99.999 mV.
   
• Read DC volts
  The 850 can measure from 0.000 to 10.250 V, -999.99 to 999.99 mV, -99.999 to 99.999 mV and 0.00 to 60.0 VDC. Use it to check loop power supplies, I/V converters, 1 to 5 Volt signals, and other voltages.

Thermocouple Calibrator

• Calibrate directly in temperature to 0.1°C & 0.1°F
  Stop carrying around a millivolt source and thermocouple tables. The 850 works with the thermocouples you use including types J, K, T, E, R, S, B, N, G, C, D, L (J-DIN), U (T-DIN) and P (Platinel II). Easily set any value quickly to within 0.1° with the adjustable digital potentiometer “EZ-DIAL” plus recall any three temperatures for instant recall with the EZ-CHECK™ switch.
   
• Measure thermocouple sensors
  Trouble shoot sensor connections and find broken wires or corroded connections. Connect your thermocouple with a miniature thermocouple connector and the 850 measures the probe to 0.1 degree C or F. Check the values of your process sensors. Instantly recall MAX and MIN values to see process variability.

RTD, Resistance Calibrator

• Calibrate ALL your RTD instruments
  With the 850 you can check & calibrate all your RTD instruments and measure RTD Sensors.
   
• Calibrate directly in temperature (°C & °F)
  Stop carrying around a decade box and RTD resistance tables. The 850 works with the RTDs you use including Platinum 100 (alpha = 3850, 3902, 3916, 3926) & 1000 (alpha = 3850) Ohm, Copper 10 & 50 Ohm, Nickel 100 and 120 Ohm. Easily set any value quickly to within 0.1° with the adjustable digital potentiometer “EZ-DIAL” plus store any three temperatures for instant recall with the EZ-CHECK™ switch. Or use like a decade box from 0.00 to 401.00 and from 0.0 to 4010.0 Ohms.
   
• Compatible with ALL process instruments
  No competitor’s calibrator is compatible with as many process instruments! Connect directly to the RTD inputs of smart transmitters, PLCs, DCS and multichannel recorders and verify their outputs or displays. Works with older instruments with fixed excitation currents and newer multichannel instruments that switch the excitation current between input channels.
   
• Measure RTD sensors
  Connect your two, three or four wire RTDs and the 850 measures the RTD within 0.1 degree C or F. Check the values of your process sensors. Instantly recall MAX and MIN values to see process variability

Frequency Calibrator

• Calibrate flow meters and frequency instruments
  Generate zero crossing square waves to check, calibrate and measure all the frequency signal instruments in your plant. Source and read frequencies from 1 to 2000 CPM (Counts-Per-Minute), 0.01 to 999.00 Hz, 0.1 to 9999.9 Hz and 0.001 to 20.000 kHz.
   
• Checkout optical pickups
  The 850 has a green LED that flashes in sync with the output frequency. Select a frequency and hold the calibrator up to the optical sensor.
   
• Measure frequency signals
  Check the values of your process frequency outputs. Instantly recall MAX and MIN values to see process variability.

pH Simulator

• Simulate pH probes into transmitters & analyzers
  Use the pH simulator to verify proper operation of pH devices before you place a probe into a calibrated buffer. Adjusting the pH transmitter or analyzer without a probe allows you to make sure the device is calibrated and doesn’t require too much offset with the probe. If the probe requires more than the manufacturer’s recommendations (typically 5%) it is time to replace the probe. The 850 simulates 0.000 to 14.000 pH @ 25°C corresponding to +414.12 to -414.12 mV.

Continuity Checker

• Troubleshoot wiring and connection problems
  Use the built-in continuity checker to look at wiring and connections during installation or to locate shorts. Beeps from 0 to 100 Ohms.

Troubleshoot Loop Problems

• Find current leaks in loops before swapping instruments
  Automatic indication of Loop Current and Leakage Current (US Patent #7,248,058) in both 4-20 and 10-50 mA loops. Measure ground current leakage from faulty wiring, flooded conduit and corrosion bridges to help you decide if there is a wiring problem in the loop (diagrams below).

Typical problem found with Leak Detection

Have you ever replaced a “faulty” transmitter only to find the problem was somewhere else in the loop? And did you end up throwing the transmitter away after you fixed the other problem “just in case” the transmitter was faulty?

If you find a loop where the transmitter is calibrated correctly but all the readings elsewhere in the loop have a fixed offset this is due to a Zero Shift. This zero shift is typically caused by some current in the loop bypassing the transmitter. This might be caused by ground faults, moisture or corrosion.

If you have some loops that are erratic after it rains there may be moisture present in a junction box or where insulation has broken down. Turn on Ground Leak Detection and use the PIE 850 to power up the loop. Any current that isn’t controlled by the transmitter or other current control element will be indicated as leakage on the PIE 850 display. Undetected current leaks may cause calibration errors which can lead to dangerous operating conditions or catastrophic results.

The PIE 850 powers up the 2-Wire transmitter or loop and indicates the total current and the uncontrolled current. This provides information useful in troubleshooting loop errors.
  Become a Loop Detective - Locate hidden loop problems with LoopScope When you need to find out why a loop is out of control and all the wiring seems to be in order turn on the 850’s LoopScope and simultaneously see all the parameters of the loop. The LoopScope simultaneously displays the current, DC voltage and total resistance in the loop. Observing the SUPPLY (DC voltage) and the LOAD (resistance) lets you see if the loop power supply has enough capacity to power all the devices in the loop.   By observing all three signals at the same time you can see how the voltage and resistance respond as the current changes. If the voltage drops too far as the current goes up you may need a power supply with more capacity or the power supply itself may be failing. If the resistance in the loop is too high you may have more devices in the loop than the power supply can handle or there may be an instrument in the loop that is drawing too much power and requires replacement.