7½ Digit Multimeter User's Manual Section 7: Sampli
ng temperature at a set time interval
DMM7510-900-01 Rev. C / September 2019 7-3
To prevent electric shock, test connections must be configured such that the user cannot
come in contact with test leads or any device under test (DUT) that is in contact with the
conductors. It is good practice to disconnect power before connecting DUTs. Safe installation
requires proper shields, barriers, and grounding to prevent contact with test leads.
There is no internal connection between protective earth (safety ground) and the LO
terminals of the DMM7510. Therefore, hazardous voltages (more than 30 V
RMS
) can appear on
LO terminals. This can occur when the instrument is operating in any mode. To prevent
hazardous voltage from appearing on the LO terminals, connect the LO terminal to protective
earth (safety ground) if your application allows it. You can connect the LO terminal to the
chassis ground terminal on the front panel or the chassis ground screw terminal on the rear
panel. Note that the front-panel terminals are isolated from the rear-panel terminals.
Therefore, if you are using the front-panel terminals, ground to the front-panel LO terminal. If
using the rear-panel terminals, ground to the rear-panel LO terminal. Failure to follow these
guidelines can result in injury, death, or instrument damage. Failure to recognize and observe
normal safety precautions could result in personal injury or death.
Sample temperatures at a specific time interval
This application demonstrates how to use the DMM7510 to measure temperature at fixed time
intervals using commands sent over a remote interface. You can make the measurement using SCPI
code or TSP code. For information about setting up remote communications, see
Remote
communications interfaces (on page 3-1).
For this application, you will:
• Reset the instrument.
• Configure the instrument to measure a temperature using an RTD type PT100.
• Enable detection of open leads and offset compensation for more accurate readings.
• Set up a timer to make a temperature measurement every 60 seconds for 1440 times (24 hours)
using a trigger model.
Using SCPI commands
This sequence of SCPI commands makes temperature readings every minute for 24 hours.
You may need to make changes so that this code will run in your programming environment. In the
table, the SCPI commands have a light gray background. The light-brown shaded code represents
pseudocode that will vary depending on the programming environment you use.
Ensure that the TERMINALS switch is set to REAR.
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