Pickering 41-761 - SECTION 7 - MAINTENANCE INFORMATION; Verification Procedure; Connecting to the Voltage Channels

SECTION 7 - MAINTENANCE INFORMATION
Page 7.3
pickering
ISOLATED MILLIVOLT THERMOCOUPLE SIMULATOR 41-761
Verication Procedure
The verication procedure describes a set of measurements that are adequate to check that the module is performing
to specication.
The following equipment is required to perform the test
● A DMM with performance at least equivalent to a 6.5 digit model. Example: Keysight 34410A or 34411A
● A cable assembly to connect the DMM to the 41-761. This can be constructed by the user or the user can
purchase a ready made cable from Pickering Interfaces suitable for connecting to the front panel connector.
6½ Digit DMM
41-761
V,Ω+ I+ V,Ω- I-
Calibration/Verification Cable
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Figure 7.1 - 41-761 Verication Setup Using the Individual Channel Connections
Connecting to the Voltage Channels:
Each channel can be independently veried using the following steps. Results from this verication can be recorded
in the tables in the following pages.
● All channels can be connected in parallel as shown in gure 7.1. This is achieved by connecting all Vo
connections and all Vcold connections, providing a single 2-wire connection to the DMM. The Vcold connection
should also be connected to the module’s Analogue_GND pin, providing a common xed reference point.
● Once a voltage is set on the module, a DMM in a high impedance mode (at least 20MΩ) must be used to
measure the result. The measurement value should be within the range specied in the corresponding table
entry for the set voltage in tables 7.2 to 7.4, observing the associated foot notes.