Charge Tracking Reset (CTR)
Charge Tracking Reset (CTR)
CTR allows the BSOC instrument to accurately track the state-of-charge during the charge cycle as well as the discharge cycle. If the Keyswitch is on, the segment of the display that corresponds to the current accurate state-of-charge will flash. CTR accurately tracks the state-of-charge during both opportunity and full-charge operations.
Open Circuit Reset (OCR)Open Circuit Reset (OCR)
When the battery is disconnected from the instrument, the instrument will retain the last known state-of-charge. If the battery is fully recharged, the instrument display will reset to full when the battery is reconnected to the instrument. If the battery is partially charged, the instrument will display the last know state-of-charge when it is reconnected to the battery. The display will then equilibrate with the state-of-charge as the discharge cycle continues (i.e. the vehicle is used). OCR is only available on models that include the Memory option.
High Voltage Reset (HVR)High Voltage Reset (HVR)
When the battery remains connected to the instrument during the charge cycle, the instrument display will reset to full when the battery voltage reaches the predetermined threshold (programmable in most Curtis products between 2.167 and 2.40 Volts per cell) for an uninterrupted 6 minutes.
Battery State-of-Charge Instruments
Curtis Instruments has long been the technological leader in the accurate measurement of state-of-charge of lead acid batteries for battery-powered industrial vehicles.
Curtis offers the widest range of Battery State-of-Charge (BSOC) instruments in the industry and continues to develop new algorithms to improve accuracy as well methods of measuring the state-of-charge of other battery chemistries and alternative fuel sources.
To review more technical information regarding state-of-charge measurement, please see
Curtis Battery Books I and II.
Models
Display |
| Hour Meter |
| Output |
Mounting |
Interconnect |
Low "Fuel" Warning |
Adjustable |
Housing |
| Keyswitch Input |
| BDI Reset Method |
| Operating Voltage |
 803 |
Tri-Color, 10-bar LED |
| Yes |
| 1 Amp Relay |
U-bracket |
Molex Connector |
Two LED Bars Flash Alternately |
Yes |
52mm round |
| Yes |
| CTR, OCR |
| 12-80 VDC |
| Data Sheets | Manuals |
| FAQs |
 841 |
8-character Dot Matrix LCD |
| Yes |
| 1 Amp Relay |
U-bracket |
Molex Connector |
Amber LED 20% Red LED 10% |
No |
52mm round |
| Yes |
| CTR, OCR |
| 24-80 VDC |
| Data Sheets |
| FAQs |
 906 |
| Red, 10-bar LED or Tri-Color, 10-bar LED |
| No |
| Logic Level 0-5V |
| U-bracket (D,R) or Snap-fit bracket (J,Y,Z) or Screws/Nuts (F,T) |
| 3/16" or 1/4" Fast-On Terminals or Packard Connector or PCB Mount Pins |
Two LED Bars flash alternately |
No |
| 52mm round (R) or 24mmx48mm Rectangular (D) or 23mmx36mm Rectangular (F,J,T) or 28mmx41mm Rectangular (Y,Z) |
| Yes |
| CTR, OCR |
| 12-48 VDC |
| Data Sheets |
| Manuals |
| FAQs |
 908 |
Tri-Color, 10-bar LED |
| No |
| 1 Amp Relay |
U-bracket |
Molex Connector |
Two LED Bars flash alternately |
No |
52mm round |
| Yes |
| CTR, OCR |
| 12-80 VDC |
| Data Sheets |
| Manuals |
| FAQs |
 enGage®II |
Fixed Segment LCD |
| Yes |
| 0.5 Amp MOSFET |
Snap-fit Bracket |
Amp or Molex Connector |
| Two LCD Bars Flash Alternately & Front-Face LED Flashes |
Yes (via buttons) |
52mm round |
| Yes |
| CTR, OCR |
| 12-80 VDC |
| Data Sheets |
| Manuals |
| FAQs |
