Curtis Computer 833 Model, High Voltage, Maximum Minimum, VDC 15.0 VDC 90 kΩ 30 kΩ, Key, Icon

Table 1. Hour Meter Control Lines & Impedance Specifications

Model	Low Voltage	High Voltage	Min. Impedance
	Maximum	Minimum	HRM+	HRM-
24 VDC	5.0 VDC	15.0 VDC	90 kΩ	30 kΩ

Table 2. Hour Meter Control Logic

Key	HRM	HRM	HRM	Hour	Icon
switch	(+)	(+)	(+)	meter
Off	x	x	x	Display only Steady
On	VH	x	x	On	Flashing
On	x	VH	x	On	Flashing
On	x	x	VH	On	Flashing
On	VL	VL	VL	Display	Flashing
	or open	or open	or open	only

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