HP WaterSkis E1312A, WaterSkis E1412A HP E1312A/E1412A Multimeter Application Information Chapter

LIMit Function The limit test operation enables you to perform pass/fail testing against limits you specify using the CALCulate:LIMit:UPPer and LOWer commands.

•Applies to all measurement functions.

•You can set the upper and lower limits to any value between 0 and

± 120% of the highest range, for the present function. The upper limit selected should always be a more positive number than the lower limit. The default upper and lower limits are both “0”.

•The upper and lower limits are stored in volatile memory; the multimeter sets both limits to 0 when power is removed from the multimeter, after the multimeter is reset or after a function change.

•You can configure the multimeter to generate a request for service (SRQ) on the first occurrence of a failed reading. See the Status System Register Diagram in Figure 3-1 on page 154. Bits 11 and 12 of the Questionable Data Register provide the high and low limit error signals that can be enabled in the status byte to generate the request for service.

•Use the following commands to activate the LIMit function and input upper and lower limit values. The calculate state must be enabled before you can store a value in the Upper Limit and Lower Limit Registers.

CALCulate:FUNCtion LIMit CALCulate:STATe ON CALCulate:LIMit:UPPer <value> CALCulate:LIMit:LOWer <value>

•The STATus:QUEStionable:CONDition register will indicate when an upper or lower limit has been exceeded failing either a HI or LO limit test. Use the STAT:QUES[:EVEN]? command to query the status questionable register and determine what failure occurred. Sending this command also clears the questionable data register (or send a Clear Status *CLS command to clear the register before testing begins).

44 HP E1312A/E1412A Multimeter Application Information Chapter 2