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3-14 Basic Operation Models 2510 and 2510-AT User’s Manual

Temperature protection limits

The upper and lower temperature limits have a valid range of -50 to +250˚C. If the lower

limit is exceeded, “UNDER-TEMP” will be displayed on the front panel, and Bit 1 (UT)

of the Measurement Event Register will be set. If the upper limit is exceeded, “OVER-

TEMP” will be displayed on the front panel, and Bit 0 (OT) of the Measurement Event

exceeded (see Section 7). Note that OUTPUT ON/OFF is inhibited by exceeding either

limit. The output will turn off if either limit is exceeded, and you cannot turn on the output

with under- or over-limit conditions.

To program the temperature limits, press CONFIG then T, then select PROTECTION and

program the limits as required. See “Conﬁguring temperature,” page 3-3, for details.

Voltage protection limit

The voltage limit has a valid range of 0.5 to 10.5V, and the default value is 10.5. If the

voltage limit is exceeded, “VLIM EXCEEDED” will be displayed on the front panel. Bit 2

(OV) of the Measurement Event Register will be set, and you can program the unit to gen-

erate an SRQ if the voltage limit is exceeded. Note that OUTPUT ON/OFF is not inhibited

by exceeding the voltage limit.

To program the voltage limit, press CONFIG then V, then select PROTECTION and pro-

gram the limit as required. See “Conﬁguring voltage,” page 3-5, for details.

Current protection limit

The current limit has a valid range of 1.0A to 5.25A, and the default value is 2.0. If the

current limit is exceeded, “ILIM” will be displayed on the front panel. Bit 3 (CO) of the

Measurement Event Register will be set, and you can program the unit to generate an SRQ

if the current limit is exceeded (see Section 7). Note that OUTPUT ON/OFF is not inhib-

ited by exceeding the current limit.

To program the current limit, press CONFIG then I, then select PROTECTION and pro-

gram the limit as required. See “Conﬁguring current,” page 3-5, for details.

Resistance protection limits

The upper and lower resistance limits apply only to RTD and thermistor sensors (see

Table 3-8). If the lower limit is exceeded, “URR” will be displayed, and Bit 5 (UR) of the

Measurement Event Register will be set. If the upper limit is exceeded, “ORR” will be dis-

played, and Bit 4 (OR) of the Measurement Event Register will be set. You can program

the unit to generate an SRQ if either limit is exceeded (see Section 7). OUTPUT ON/OFF

is inhibited by exceeding either resistance limit.

To program the resistance limits, press CONFIG then R, then select PROTECTION and

program the limits as required. See “Conﬁguring DC resistance,” page 3-6, and

“Conﬁguring AC resistance,” page 3-6, for details.

Keithley 2510 User Manual

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