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TC-2095 Terminal Block Calibration Procedure

2

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Equipment and Other Test Requirements

This section describes the equipment, software, documentation, and test
conditions required for verifying the performance of the TC-2095.

Test Equipment

Verification requires a high-precision voltage source with at least 50 ppm
accuracy, a multiranging 5 1/2 digit digital multimeter (DMM) with
15 ppm accuracy, and a thermometer that is accurate to within 0.1

°

C.

NI recommends you use the following instruments for verifying the
performance of the TC-2095:

Calibrator—Fluke 5700A

DMM—NI 4060 or Agilent 34401A

Note

You also need three test connector adapters that fit the 96-pin connector pins.

Use a Pomona 3560 banana jack to test adapter connector (0.040 in. diameter pins) or
an equivalent connector.

If these instruments are not available, use the accuracy requirements listed
above to select a substitute calibration standard.

Software and Documentation

You can find all the necessary information to verify the performance
of the TC-2095 in this verification procedure. No other software or
documentation is required. If you would like more information on the
TC-2095, refer to the

BNC/TC-205 Rack-Mount Adapter Installation

Guide

, which you can download from the NI Web site at

ni.com/manuals

.

Test Conditions

Follow these guidelines to optimize the connections and the environment
during verification:

Keep connections to the TC-2095 terminal block short. Long cables
and wires act as antennae, picking up extra noise that can affect
measurements.

Use shielded copper wire for all cable connections to the terminal
block. Use twisted-pair wire to eliminate noise and thermal offsets.

Keep relative humidity below 80%.

Maintain a temperature between 15 and 35

°

C.

Summary of Contents for TC-2095

Page 1: ...error For TC 2095 terminal blocks calibration is simply verifying the measurement accuracy of the components on the terminal block Because these components are not user adjustable calibration consists of verification only without correcting for any error Verification is measuring the performance of a device and comparing the results to the factory specifications of the device Why Should You Verify...

Page 2: ...ivalent connector If these instruments are not available use the accuracy requirements listed above to select a substitute calibration standard Software and Documentation You can find all the necessary information to verify the performance of the TC 2095 in this verification procedure No other software or documentation is required If you would like more information on the TC 2095 refer to the BNC ...

Page 3: ...ly upright and view it from the rear The terminals on the 96 pin DIN connector are designated as follows Column A is on the bottom Column B is in the middle and Column C is on the top Row 1 is on the right and Row 32 is on the left Figure 1 illustrates the connector pin assignments Individual pins are identified by their column and row For example A3 denotes the terminal located in Column A and Ro...

Page 4: ...or adapter to terminal A2 on the 96 pin female DIN connector on the rear of the terminal block Attach the other end of this wire to the negative terminal of the 5 VDC power supply 2 Connect a calibrated DMM to the temperature sensor output of the terminal block a Refer to Figure 2 to locate jumper W1 and verify that MTEMP is jumpered on the terminal block Figure 2 TC 2095 Terminal Block Parts Loca...

Page 5: ...nt where the temperature is between 15 and 35 C 4 When the terminal block temperature reaches equilibrium with its surroundings measure the temperature sensor output Vmeas using a calibrated DMM 5 Measure the actual temperature Tact in the temperature controlled environment using a thermometer calibrated to within 0 1 C accuracy Position the thermometer as near as possible to the CJC sensor 6 Conv...

Page 6: ...as 0 5 C the terminal block temperature sensor is nonfunctional Return the terminal block to NI for repair or replacement If Tact Tmeas 0 5 C the terminal block temperature sensor is nonfunctional Return jumper W1 to its original position Return the terminal block to NI for repair or replacement You have completed verifying the performance of the temperature sensor on the TC 2095 terminal block ...

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