MODEL 833 “FUEL” GAGE/HOUR METER W/“PUSH® ! Read Instructions Carefully !
! Safety Instructions This instrument was manufactured and tested according to the applicable technical standards. It complies with all the safety regulations as shipped from the factory. Installation and startup must be performed by skilled personnel. Failure to install and operate the unit in accordance with these instructions may result in damage or injury. If safe operation of the instrument can no longer be ensured, stop and secure it against accidental operation.
TABLE OF CONTENTS 1. Model Encodement 2. Technical Specifications 2.1 Electrical 2.2 Mechanical 2.3 Environmental 3. Installation 4. Operation 5. Troubleshooting 6.
1. MODEL ENCODEMENT 833RB vvvv w Voltage 0024 Reset level B = 2.
x y zzzz Discharge profile C = Adjustable (See Table 3.) Output J = N.C.
2. TECHNICAL SPECIFICATIONS 2.
2.2 Mechanical Display Battery state-of-charge: 10-bar, tri-color LED Hour Meter: 6-digit LCD, 5mm high Resolution Hour Meter 99,999.9 Hours Hardware Kit Mounting bracket, thumbnuts or M4 Hex nuts (2), lock washers (2), mating connector Molex No. 39-01-2085, w/pins No. 39-00-0039, no connectors in bulk shipments.
2.3 Environmental ! Temperature Operating: Storage: -40°C to +65°C (Standard Mode) -10° C to +65° C (Push-to-read Mode) -50°C to +90°C Humidity Shock & Vibration 95% RH (Non Condensing) at 38°C Enclosure IP65 (face) 2.
3. INSTALLATION The Model 833 Installation Kit includes a pre-assembled mating connector with 5” terminated wires. Ask for Curtis Part Number 15369002. ! The Model 833 fits into a dash-panel cutout measuring 21/16” (52 mm).
Pin 5 = Battery – Connect to battery ground as close to battery as possible. Pin 2 = Keyswitch The keyswitch turns on and off the LED display of the battery discharge indicator. Monitoring of the battery continues when Pin 2 is turned off and the display is not lit. The hour meter display is unaffected by Pin 2, although it cannot accumulate more time as long as the keyswitch pin is not energized. The control input HRM (+) is enabled by the keyswitch. Pin 2 is connected to the vehicle’s keyswitch.
Pin 3 = Relay (+) Pin 3 connects in series with the lift coil circuit (or the circuit to be switched at empty). For holding relay (J), Pin 3 must be electrically closer to battery + than Pin 4 Pin 4 = Relay (–) Pin 4 also connects in series with the circuit to be switched at empty.
Table 1. Hour Meter Control Lines & Impedance Specifications Model Low Voltage Maximum 24 VDC 5.0 VDC High Voltage Min. Impedance Minimum HRM+ HRM15.0 VDC 90 kΩ 30 kΩ Table 2.
NOTE: Fuses and Wires ! Regulations may require that the Model 833 be fused. If installing a fuse, use a 10A fuse wired with 1.5mm or equivalent wire. The voltage drop across the fuse, its holder, and connectors must be less than 1% of the nominal system voltage. Discharge Adjustments Table 3 lists the voltages per cell under load that correspond to an empty indication on the gauge (lockout point). Table 3. Discharge Adjustment Settings Setting K L M N O P Q R S T U Volt/Cell at Empty 1.57 1.63 1.68 1.
! CURTIS Model 833 Rear View 12
! Connections for Typical Model 833 Application Vehicle system voltage is the higher of the two operating voltages of a dual voltage unit. Hour meter measures “keyswitch on” time.
4. OPERATION Display The Curtis Model 833 combines in one instrument a completely solid state LED battery state-of-charge indicator, an LCD hour meter, and lift lockout. Only when battery is properly charged is right most LED (1) lit. As battery’s state-of-charge decreases, successive LEDs light up, one at a time. 2nd from left LED flashes indicating “energy reserve” (70% discharged). The left most 2 LEDs flash indicating “empty” (80% depth of discharge). At this point, lift lockout occurs.
Push-to-read When the front button is depressed, the LCD will display the hour meter reading for 6 seconds min. The hour meter will not accumulate time during this operation. Reset type/level (after or during recharge) CTR = Charge Tracking Reset If the gage is connected to the battery during recharge, the gage will track the battery charge level. OCR = Open Circuit Reset If the gage is disconnected from the battery during recharge, the gage will retain the last indication.
5. Troubleshooting The following checklist should help you to troubleshoot any problems with the instrument.
6. Maintenance Model 833 Series is not serviceable in the field. Units returned to the factory within the warranty period (see inside backcover) will be replaced without charge.
Guarantee - Curtis Instruments’ products and/or components are guaranteed against defects in workmanship and material for a period of two years, or as defined in the individual product literature, from date of shipment from our factory, when applied in a proper application within specified ratings. This guarantee is limited to repair or replacement F.O.B. our factory.
CURTIS INSTRUMENTS, INC. 200 Kisco Avenue, Mt. Kisco, NY 10549 Tel.
