INSTRUMENTATION - FAQS

 
Battery Discharge Indicators | Timing & Counting |
 
What is the difference between a model 700 and a model 701 hour meter?
The model 700 hour meter will turn on its display and begin to accumulate time when power is applied to its V+ and V- pins. When power is removed the display will blank out. The model 701 hour meter will turn on its display when power is applied to its V+ and V- pins. However, it will not accumulate time until power is applied to it Input pin. In this manner, the model 701 hour meter can have its display on continuously for viewing at any time without accumulating time.
Which is the most popular hour meter case style? Which is the most popular counter case style?
The “Q” case style is the most popular hour meter case style. ( please show samples of case styles). The “D” case style is the most popular counter case style.
What happens when the 700/701 hour meter display is filled up? That is, after 99999.9 hours have elapsed? And if it operates 24 hours a day, how many years does it take to reach this point?
After 99999.9 hours the hour meter will roll over to 0.0 hours. Operating 24 hours a day it takes these six digit hour meter 11.45 years to reach this point.
Do I have to wait 0.1 hour (6 minutes) for the hour meter to increment to know if the 700/701 hour meter is accumulating time?
No, the hour glass icon on the left-hand of the display will flash on for 3 seconds and off for one while the hour meter is accumulating time.
Years ago I had seen LCD’s that turn black when left out in the sun. Does the 700/701 hour meter need to be shielded from the full sun?
The LCD’s which turned black in the sun were not able to withstand a high ambient temperature. The LCD for the 700/701 hour meter is designed to operate up to 85° C (185° F). The hour meter can operate in full sun without requiring a shield.
I want to replace an electromechanical hour meter. Does Curtis make an hour meter that I can set to the number of hours that is displayed on my old unit so that I can continue to keep track of the total hours on my machinery?
A stand-alone settable hour meter is not offered by Curtis. A settable hour meter is offered within the enGage II and enGage III units in combination with another gage.
How can I find out which Curtis hour meters and counters are UL recognized?
The Curtis components which are UL recognized are listed in the UL website, www.ul.com. Look in their Online Certification Directory and search for UL File Number E45175, Time Indicating and Recording Appliances – Components or AU1841 Industrial Truck Accessories, Battery Powered -- Components
Does Curtis offer replacements for the FUJI coulometers that have been obsoleted?
Curtis has been supplying components to manufactures who are supplying replacements to these coulometers. Please contact the Curtis Applications Engineering department for the current list of these vendors.
In which 5mm case style is backlighting available for the 700/701 hour meters?
Backlighting is only available for the 7mm encased units. These 7mm backlit units are available in a 48 mm square “S” case and a 2 inch round “R” case style. Backlit 5 mm hour meter modules (without a case) are available for use in designs that provide their own mechanical protection.
Does the display on the model 703 pulse counter increment on the high-going edge or on the low-going edge of the pulse?
This display will increment on the low-going (trailing) edge of the pulse.
Do you have an hour meter that can operate at 480 VAC?
With an external diode and dropping resistor, the model 700/701 hour meters can operate at this voltage. Contact a Curtis Applications Engineer for more details.
How does a Curtis model 700/701 hour meter differ from most other LCD hour meters in the market?
Most other LCD hour meters in the market use a battery to power the LCD and to store the accumulated time. This battery is likely to wear out, especially at extreme high or low temperatures.The Curtis hour meter uses does not use a battery to retain the accumulated time. Rather, it detects when power has been removed and stores the accumulated time in a non-volatile memory. This memory will store the accumulated time, without power, for up to 25 years.