vPad-XSC for Impulse 4000 USER MANUAL3.3.2 Defibrillator Charge Time TestTo perform a defibrillator charge time test, use a vPL statement of the formxtest "< instr >" | DCH< fmt >,< targ > ,where:< instr > is an instruction to be displayed to the user while the charge time test is in progress,DCH is the command to measure defib charge time,< fmt > can be either “S” or “L”, as there is only one test result format,< wave > is ECG waveform designator, selected from the ECG table with ** indicators,and< targ > is an optional energy target (in joules) for automatic pass/fail assessmentNote the comma (“,”) separating the required parameters from the optional target energy.3.3.2.1 Example 9: Measuring Defibrillator Charge TimeA Checklist may start a defibrillator charge time test with a standard target energy equal to themaximum energy that the defibrillator can supply using a vPL statement similar to the following:xtest "Charge when Impulse 4000 shows MAXESTART, then discharge.\n\nVerify charge time is less than 10 seconds" | DCHS,AFB1,360For this statement,DCH commands Impulse 4000 to initiate a charge time test;S is a placeholder which may be either “S” or “L” (does not affect report)Assuming that defib energy and charge time limits are set to defaults, the Interface automaticallyassigns a “PASS” result if the charge time is less than 10 s. For the case of a "PASS", the TestReport will contain an entry similar to the following:If a parameter is not specified, its position in the statement must be present but left blank. Forinstance, if no waveform is to be defined, the above statement would be changed to:xtest "Charge when Impulse 4000 shows MAXESTART, etc." | DEHS,,360Operation/Chapter 3 # Page 16
